Analysis of a InGaAs/InP single photon detector at 1550 nm
Analysis of a InGaAs/InP single photon detector at 1550 nm
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DOI：
10.1080/09500340.2013.825337
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发表时间：
2013-07
影响因子：
1.3
通讯作者：
X.M. Zhang;C. Liang;G. Liu;D. Y. Fan;P. Lang;Z. Sun;H. Ma;R. Zhang;M. Lei
中科院分区：
文献类型：
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作者：
X.M. Zhang;C. Liang;G. Liu;D. Y. Fan;P. Lang;Z. Sun;H. Ma;R. Zhang;M. Lei
介绍了一种新型的单光子探测器，并对其相关性能进行了表征。工作在盖革模式下的单光子探测器采用了一种新型的冷却系统来调节温度，它可以使温度下降到−65 ℃。此外，单光子探测器采用了延迟时间调制反馈控制电路来减小后脉冲效应，门脉冲通过电容耦合到雪崩二极管。此外，还采用了适当的延迟和具有锁存功能的比较器电路来检测雪崩信号。实验条件为：时钟频率为10 MHz，制冷温度为−65 °C，控制脉冲宽度为5 ns。实验结果表明，该探测器在最佳工作点的量子效率为20.42%，暗计数率为5 × 10 - 6 ns-1，信噪比为27 dB。所设计的单光子探测器实现了较低的暗计数率和高量子效率之间的折衷。
A new type of single-photon detector is introduced and its related properties characterized. The single-photon detector operating in the Geiger mode uses a new type of cooling system to moderate temperature, which can make the temperature drop to −65 °C. Besides, the single-photon detector adopts a hold-off time modulation feedback control circuit to decrease the afterpulsing effects and the gate pulse is coupled to the avalanche diode through capacitance. In addition, a suitable delay and comparator with latch function circuit are used to detect avalanche signals. Experimental conditions are that the clock frequency is 10 MHz, refrigeration temperature is −65 °C, and the width of control pulse is 5 ns. The experimental results indicate that quantum efficiency is about 20.42% and the dark count rate is about 5 × 10−6 ns−1 with signal-to-noise ratio 27 dB at the optimum operation point of this detector. The designed single-photon detector achieves a tradeoff between lower dark count rates and high quantum efficiency.